More than a week since my last Zune Marketplace download (Rushmore soundtrack, 3/13/2017 around 11 PM CT). I still can log in but can't download anything. The Marketplace server is down but hopefully not out. It's not much use if I can't download new tracks and sync them with my Zunes. I haven't really taken to Groove yet or web app, but I guess I'll have to do that eventually.
Zune software settings still show one computer and three Zunes authorized. Maybe I'll drop one and add one to see if that helps.
When I log into my account on the web, none of the Zunes show (they may all have a sync relationship of "Guest" in the Zune software). Just the PC shows on the web's Microsoft account, under music devices, but maybe it's always been that way. It shows the PC was last used 3/18. My subscription is good until February 2018 with a valid credit card for renewal.
I still have a few Zune players with playable music. The licenses are all likely to expire 4/14, but I'm hoping will renew both on the PC and those players once synced again. Stay tuned.